My original rocker cover with the cast in bracket got broken trying to unthread a seized in rubber isolation mount.
My solution was to replace two of the rocker cover screws with SS studding about 30mm long, then buy 2 long SS 6mm spacer nuts from Screwfix and machine one end to replicate the size of the socket cap screw head. The studding extends through the long nut to which an aluminium bracket is bolted.